// Copyright (c) 2015 SharpYaml - Alexandre Mutel
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

namespace Stride.Core.Reflection;

public class DefaultKeyComparer : IComparer<object>
{
    public int Compare(object? x, object? y)
    {
        if (x is IMemberDescriptor left && y is IMemberDescriptor right)
        {
            // If order is defined, first order by order
            if (left.Order.HasValue || right.Order.HasValue)
            {
                var leftOrder = left.Order ?? int.MaxValue;
                var rightOrder = right.Order ?? int.MaxValue;
                return leftOrder.CompareTo(rightOrder);
            }

            // else order by name (dynamic members, etc...)
            return left.DefaultNameComparer.Compare(left.Name, right.Name);
        }

        if (x is string sx && y is string sy)
        {
            return string.CompareOrdinal(sx, sy);
        }

        if (x is IComparable leftComparable)
        {
            return leftComparable.CompareTo(y);
        }

        var rightComparable = y as IComparable;
        return rightComparable?.CompareTo(y) ?? 0;
    }
}
